Superfund CLP Quality Assurance

The Contract Laboratory Program (CLP) maintains a comprehensive quality assurance (QA) program to ensure CLP data is compliant with EPA’s Environmental Information Quality Policy (CIO 2105.1) which states “EPA’s commitment to utilizing environmental information of known and documented quality, scientifically valid, legally defensible, and appropriate for the intended use”. The CLP’s QA program utilizes on-site laboratory audits, proficiency testing audits and proficiency evaluation samples, data package and electronic media audits, data inspection and usability assessments, and performance-based laboratory scheduling. The EPA continuously monitors the CLP contracted laboratories in accordance with the analytical Statements of Work (SOW).